Update build_board_info.py to sh module 2.0.0

Author: Neradoc

tools/build_board_info.py

@@ -58,9 +58,9 @@ def get_languages(list_all=False):
 
 def get_version_info():
     version = None
-    sha = git("rev-parse", "--short", "HEAD").stdout.decode("utf-8")
+    sha = git("rev-parse", "--short", "HEAD").strip()
     try:
-        version = git("describe", "--tags", "--exact-match").stdout.decode("utf-8").strip()
+        version = git("describe", "--tags", "--exact-match").strip()
     except sh.ErrorReturnCode_128:
         # No exact match
         pass